The remote controls will appear in your notifications shade when you drag it down. You can also set it to come on automatically on your lock screen when you get home with these easy steps:
Press the Quick Remote icon to run the app, select the place of use for
remote control on the upper left, then press the "+" button on the upper
right to add a new remote.
"+" > Select device > Select manufacturer set remote to choose the TV, cable
box, and audio of your choice. Point the top of the LG G4 towards the device
and press each button (power, mute, settings) to complete the process.
Select the type you find most convenient to add numpads or navigation keys to
your new custom remote.
With the newly released LG Smart TV™, you can substitute the Magic Remote with
your LG G4. You can also register shortcut buttons for your favorite channels.